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Finding the Fourth Proportional to 557.20, 832.24 and 480.40

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Solution

The fourth proportional to 557.20, 832.24 and 480.40 is: 717.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.20 : 832.24 = 480.40 : x
  2. Step 2: Convert to fraction form
    557.20/832.24 = 480.40/x
  3. Step 3: Cross multiply
    557.20x = 832.24 × 480.40
  4. Step 4: Simplify right side
    557.20x = 399,808.10
  5. Step 5: Solve for x
    x = 399,808.10/557.20
  6. Step 6: Final answer
    x = 717.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.